Logitech Modula 2 3.x

Back before Logitech just sold mice, they produced a programming development system based on the Modula-2 language.

Logitech Modula-2/86 could compile very large programs, produced efficient native code, and included a symbolic debugger. There were versions for both PC-DOS and CP/M-86.

Other companies provided additional libraries for Logitech Modula-2/86; one example would be Repertoire.